Separable fastener



Jan. 21, 1941. D. MARlNsKY SEPARABLE ms'rmmx Filed Feb. 9, 1940 lNvEN-roR ,wir/5 MAR/msm E malll ATTORNEY Patented Jan. 2l, 1941 UNITED STATES SEPARABLE FASTENER Davis Marinsky, Bronx,

N. Y., assignmto Whitehall Patents Corporation, Bronx, N. Y., a corporation of New York Application February 9, 1940, Serial No. 318,053

1 Claim.

This invention relates to separable fasteners employing stringers adapted to be coupled anduncoupled by a slider movable longitudinally of the stringers. More particularly, the invention relates to what might be termed a duplex structure of this type and kind employing two pairs of stringers arranged one directly above the other and with a double channeled slider for receiving the pairs of stringers to couple and uncouple both lo pairs of stringers in the movement of the slider longitudinally thereof. The novel features of the invention will be best understood from the following description and annexed drawing in which certain embodiments4 of the invention are disclosed, and in which the separate pa s are designated by suitable reference character in each of the views; and in which:

Fig. 1 is a face View of a part of a fastener made according to my invention, indicating the stringers partly coupled and partly uncoupled.

Fig. 2 is a section substantially on the line 2-2 of Fig. 1.

Fig. 3 is a section substantially on the line 3--3 of Fig. 1; and,

Fig. 4 isa perspective view of slider detached. In certain installations of separable fasteners of the type known as slide fasteners, it is desirable to employ two pair of stringers to give added strength to the fastener. This is especially true where the fastener is subjected to excessive stress or strain. Fasteners of this type and kind are desirable for use on certain types of luggage and, in fact, can be used on various types of garments which are subjected to heavy stress or strain. In certain uses the Stringer tapes may be rst united together and then joined to the support; or the tapes may be separately secured to independent supports of a common article or garment. -In both instances, how- 0 ever,'a single double channeled slider will be utilized to simultaneously couple and uncouple both of the stringers employed. In other words, the duplex fastener forming the subject matter of this invention might be termed a heavy duty fastener. A fastener of this type and kind is made possibleby the construction of a simple and economical form of duplex slider of the speciflc construction which is hereinafter more fully set forth.

In Figs. 1, 2 and 3 of the drawing, I0, Illa represent the stringer tapes of one fastener; and II, I Ia represent corresponding stringer tapes of the other fastener forming the duplex fastener stringers. 'Ihe tapes I0, II and I 0a, IIa 55 may be independently secured to supports, or

these tapes may be stitched together as seen at I3 to form a unitary double tape structure. The adjacent edges of the tapes are beaded as seen at Il in the usual manner; and on these beaded` edges are attached the coupling links or scoops I 5 5 which may be of any desired construction and formed of metal or plastic materials. When the tapes are secured together as shown, tapes 'III-I I and IIla-I I a form two pairs of tapes with their link-carrying edges free from each other. m

At I6 I have shown one of my improved sliders which comprises a unitary die cast body of metal or metal alloys, or of thermoplastic material such for example as cellulose acetate. The slider I 8 comprises a top wall I1, a bottom vwall I8, which 1 may for convenience be referred to as outer Walls, and a central wall I9; the latter dividing the body I5 into an upper channel 20 and a lower channel 2| to receive the links of the stringer tapes III, Ila and II,` Ila respectively. The wide end 2 portion of the walls I1, I8, and I9 are joined and spaced apart by the connecting web 22 which is disposed centrally of the wide end of said walls, the web dividing each channel 20, 2 I. at said wide end of the sliders as in other devices of this type 25 and kind. The side edges of the Wall I1 have inturned iianges Ila, and the corresponding edges of the wall I8 have intumed flanges I8a, whereas the edges of the intermediate partition wall I9 terminate in laterally extending flanges I 9a, which form of the wall I9 what might be termed an I-beam cross-sectional contour as will appear in Fig. 3 of .the drawing, particularly at the narrow end of the slider. The flanges' I'Ia, Ila.l and I9a, provide at the sides of the slider, openings 35 or passages 23 toA receive the tapes III-Illa,

I I-I Ia, as will be apparent.

Upon the outer surface of the top wall I l of the slider is disposed a channel bar or other means 24 for coupling a pull 25 with the slider. w The illustration in the accompanying drawing shows only one adaptation of pull mounting; it being understood that this may be varied to suit fasteners of different types and kinds.

By forming the slider I6 of die cast materials, avery simple and economical form of slider body is provided thereby simplifying the construction of a duplex fastener of the type and kind described. 'It will be understood that in the operation of the slider I6 on the stringers that the g links I5 of the Stringer tapes IIl-IIIa will be coupled and uncoupled simultaneously with the coupling and uncoupling of the links I5 of the tapes I I, I la. A duplex fastener of the character described will give double strengthf to the fastener or coupling of two opposed members of a piece of luggage or opposed members of garments or other devices. With heavy duty fasteners of this type and kind a relatively large pull is provided to insure a firm grip upon the pull facilitating the operation of the slider along the stringers especially in drawing the stringers -together in coupling the same as will be apparent.

In theconstruction of fasteners of the type and kind under consideration, the links of a stringer tape are commonly referred to as link chains, and it may be thus said that each Stringer of applicants duplex fastener is composed of a pair oflink chains; and the pairs of link chains of opposed stringers are coupled together by the slider movable longitudinally of the stringers.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is;

As an article of manufacture, a separable fastener comprising two pairs of tapes, each tape having coupling links on one edge thereof, means securing together the tapes of each pair, with a free space between the link-carrying edges of each pair, and a slider having a single central wall arranged to move in said space during operation of the slider and two outer walls parallel to said central wall and joined thereto by a connecting web, said central wall having flanges at its opposite edges extending outwardly from the wall in opposite directions therefrom and the opposite edges of said outer walls having inwardly extending fianges in line with those on the central wall, whereby said central flanged wall and connecting web cooperate with both said outer anged walls to form channels for the four edges of the tapes.

DAVIS MARINSKY. 

